<script setup>
import { ref, onMounted } from 'vue'
import { queryPageApi, queryDeptListApi, queryRoleListApi, addApi, queryByIdApi, updateApi, deleteApi } from '@/api/user'
import { ElMessage, ElMessageBox } from 'element-plus'

// 页面加载完毕后, 执行查询
const token = ref('')
onMounted(() => {
  loadDeptList()
  loadRoleList()
  search()

  // 获取token
  token.value = localStorage.getItem('token');
})

// 查询参数
const queryParams = ref({
  name: '',
  phone: '',
  deptId: '',
  status: '',
  page: 1,
  pageSize: 10
})

// 表格数据
const userList = ref([])
const total = ref(0)

// 部门列表
const deptList = ref([])

// 角色列表
const roleList = ref([])

// 加载部门列表
const loadDeptList = async () => {
  const result = await queryDeptListApi()
  if(result.code == 1){
    deptList.value = result.data
  }
}

// 加载角色列表
const loadRoleList = async () => {
  const result = await queryRoleListApi()
  if(result.code == 1){
    roleList.value = result.data
  }
}

// 搜索
const search = async () => {
  const result = await queryPageApi(queryParams.value)
  if(result.code == 1){
    userList.value = result.data.rows;
    total.value = result.data.total;
  }
}

// 清空
const clear = () => {
  queryParams.value = {name: '', phone: '', deptId: '', status: '', page: 1, pageSize: 10} 
  search()
}

// 分页大小改变
const handleSizeChange = (val) => {
  search()
}

// 页码改变
const handleCurrentChange = (val) => {
  search()
}

// 对话框
const formTitle = ref('')
const dialogFormVisible = ref(false)
const formLabelWidth = '80px'
const user = ref({
  username: '',
  name: '',
  phone: '',
  email: '',
  gender: '',
  status: '',
  deptId: '',
  roleId: '',
  image: '',
  remark: ''
})

// 表单校验规则
const userFormRef = ref(null)
const rules = ref({
  username: [
    { required: true, message: '用户名为必填项', trigger: 'blur' },
    { min: 2, max: 20, message: '用户名应该在2-20位之间', trigger: 'blur' },
  ],
  name: [
    { required: true, message: '姓名为必填项', trigger: 'blur' },
    { min: 2, max: 20, message: '姓名应该在2-20位之间', trigger: 'blur' },
  ],
  phone: [
    { required: true, message: '手机号为必填项', trigger: 'blur' },
    { pattern: /^1[3-9]\d{9}$/, message: '请输入正确的手机号', trigger: 'blur' },
  ],
  email: [
    { required: true, message: '邮箱为必填项', trigger: 'blur' },
    { min: 5, max: 50, message: '邮箱应该在5-50位之间', trigger: 'blur' },
    { type: 'email', message: '请输入正确的邮箱格式', trigger: 'blur' },
  ],
  gender: [
    { required: true, message: '性别为必填项', trigger: 'blur' }
  ],
  status: [
    { required: true, message: '状态为必填项', trigger: 'blur' }
  ]
})

// 添加用户
const handleAdd = () => { 
  dialogFormVisible.value = true
  formTitle.value = '新增用户'
  user.value = {
    username: '',
    name: '',
    phone: '',
    email: '',
    gender: '',
    status: '',
    deptId: '',
    roleId: '',
    image: '',
    remark: ''
  }

  if (userFormRef.value){ // 如果表单存在
    userFormRef.value.resetFields()
  }
}

// 保存用户
const save = async () => { 
  userFormRef.value.validate(async (valid) => { // 表单校验 true:校验成功  false:校验失败
    if(valid){ //校验成功

      let result ;
      if(user.value.id){ // 如果user有id, 执行修改 -- id有值(并且不是0)就是true, 没值或0 就是false
        result = await updateApi(user.value);
      }else{
        // 新增用户时，设置默认密码为用户名+123
        user.value.password = user.value.username + '123'
        result = await addApi(user.value);
      }
      
      if(result.code){ //成功
          ElMessage.success('保存成功')
          dialogFormVisible.value = false
          search()
      }else { //失败
          ElMessage.error(result.msg)
      }
      
    }else {
      ElMessage.error('请填写正确的数据')
    }
  })
}

// 点击修改按钮触发
const handleEdit = async(id) => {
  const result = await queryByIdApi(id)
  if(result.code){ //成功
    dialogFormVisible.value = true
    formTitle.value = '修改用户'
    user.value = result.data

    if (userFormRef.value){ // 如果表单存在
      userFormRef.value.resetFields()
    }
  }else {
    ElMessage.error(result.msg)
  }
}

// 删除用户
const handleDelete = async(id) => {

  ElMessageBox.confirm('您确认要删除该用户吗?', '提示', { confirmButtonText: '确定',cancelButtonText: '取消',type: 'warning'})
  .then(async () => { // 确认

    const result = await deleteApi(id)
    if(result.code){
      ElMessage.success('删除成功')
      search()
    }else {
      ElMessage.error(result.msg)
    }

  }).catch(() => { // 取消
     ElMessage.info('已取消删除')
  })

}

// 批量删除
const multipleSelection = ref([])

// 表格选择项变化
const handleSelectionChange = (selection) => {
  multipleSelection.value = selection
}

// 批量删除
const handleBatchDelete = () => {
  if(multipleSelection.value.length === 0) {
    ElMessage.warning('请选择要删除的用户')
    return
  }

  const ids = multipleSelection.value.map(item => item.id).join(',')
  
  ElMessageBox.confirm(`您确认要删除选中的${multipleSelection.value.length}个用户吗?`, '提示', { confirmButtonText: '确定',cancelButtonText: '取消',type: 'warning'})
  .then(async () => { // 确认

    const result = await deleteApi(ids)
    if(result.code){
      ElMessage.success('删除成功')
      search()
    }else {
      ElMessage.error(result.msg)
    }

  }).catch(() => { // 取消
     ElMessage.info('已取消删除')
  })
}

// 文件上传相关
const uploadRef = ref(null)

// 文件上传前的处理 - 校验文件: true - 校验通过, 允许上传 ; false - 校验不通过, 不允许上传
const beforeUpload = (file) => {
  const isImage = file.type === 'image/jpeg' || file.type === 'image/png' || file.type === 'image/jpg'
  const isLt2M = file.size / 1024 / 1024 < 2

  if (!isImage) {
    ElMessage.error('上传头像图片只能是 PNG/JPG/JPEG 格式!')
    return false
  }
  if (!isLt2M) {
    ElMessage.error('上传头像图片大小不能超过 2MB!')
    return false
  }
  return true
}

// 文件上传成功
const handleUploadSuccess = (response) => {
  if(response.code) {
    user.value.image = response.data
    ElMessage.success('上传成功')
  } else {
    ElMessage.error(response.msg || '上传失败')
  }
}

</script>

<template>
  <div class="user">
    
    <!-- 搜索区域 -->
    <el-form :inline="true" :model="queryParams" ref="queryForm" class="search-form">
      <el-form-item label="姓名">
        <el-input v-model="queryParams.name" placeholder="请输入姓名"/>
      </el-form-item>

      <el-form-item label="手机号">
        <el-input v-model="queryParams.phone" placeholder="请输入手机号"/>
      </el-form-item>

      <el-form-item label="部门">
        <el-select v-model="queryParams.deptId" placeholder="请选择" clearable style="width: 100%">
          <el-option v-for="dept in deptList"  :key="dept.id"  :label="dept.name" :value="dept.id"  />
        </el-select>
      </el-form-item>

      <el-form-item label="状态">
        <el-select v-model="queryParams.status" placeholder="请选择" clearable style="width: 100%">
          <el-option label="正常" :value="1" />
          <el-option label="停用" :value="0" />
        </el-select>
      </el-form-item>

      <el-form-item class="search-buttons">
        <el-button type="primary" @click="search"><el-icon><Search /></el-icon>搜索</el-button>
        <el-button @click="clear"><el-icon><Refresh /></el-icon>清空</el-button>
      </el-form-item>
    </el-form>
    
    <!-- 操作按钮区域 -->
    <div class="operation-area">
      <el-button type="primary" @click="handleAdd"><el-icon><Plus /></el-icon>添加用户</el-button>
      <el-button type="danger" @click="handleBatchDelete"><el-icon><Delete /></el-icon>批量删除</el-button>
    </div>

    <!-- 表格区域 -->
    <el-table :data="userList" style="width: 100%" border @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="55" align="center" />
      <el-table-column prop="name" label="姓名" width="120" align="center" />
      <el-table-column prop="username" label="用户名" width="150" align="center" />
      <el-table-column prop="image" label="头像" width="100" align="center">
        <template #default="scope">
          <el-avatar :size="40" :src="scope.row.image">
            <el-icon><User /></el-icon>
          </el-avatar>
        </template>
      </el-table-column>
      <el-table-column prop="deptName" label="部门" width="150" align="center" />
      <el-table-column prop="roleName" label="角色" width="150" align="center" />
      <el-table-column prop="phone" label="手机号" width="150" align="center" />
      <el-table-column prop="status" label="状态" width="100" align="center">
        <template #default="scope">
          <el-tag :type="scope.row.status === 1 ? 'success' : 'danger'">
            {{ scope.row.status === 1 ? '正常' : '停用' }}
          </el-tag>
        </template>
      </el-table-column>
      <el-table-column prop="updateTime" label="最后操作时间" width="180" align="center" />
      <el-table-column label="操作" align="center">
        <template #default="scope">
          <el-button type="primary" link @click="handleEdit(scope.row.id)"><el-icon><Edit /></el-icon>修改</el-button>
          <el-button type="danger" link @click="handleDelete(scope.row.id)"><el-icon><Delete /></el-icon>删除</el-button>
        </template>
      </el-table-column>
    </el-table>

    <!-- 分页区域 -->
    <div class="pagination">
      <el-pagination
        v-model:current-page="queryParams.page"
        v-model:page-size="queryParams.pageSize"
        :page-sizes="[10, 20, 30, 40, 50]"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
      />
    </div>

    <!-- 添加用户 / 修改用户 对话框 -->
    <el-dialog v-model="dialogFormVisible" :title="formTitle" width="700">
      <el-form :model="user" :rules="rules" ref="userFormRef" :label-width="formLabelWidth"> 
        <el-row :gutter="20">
          <el-col :span="12">
            <el-form-item label="用户名" prop="username">
              <el-input v-model="user.username" autocomplete="off" placeholder="请输入用户名"/>
            </el-form-item>
          </el-col>
          <el-col :span="12">
            <el-form-item label="姓名" prop="name">
              <el-input v-model="user.name" autocomplete="off" placeholder="请输入姓名"/>
            </el-form-item>
          </el-col>
        </el-row>

        <el-row :gutter="20">
          <el-col :span="12">
            <el-form-item label="手机号" prop="phone">
              <el-input v-model="user.phone" autocomplete="off" placeholder="请输入手机号"/>
            </el-form-item>
          </el-col>
          <el-col :span="12">
            <el-form-item label="邮箱" prop="email">
              <el-input v-model="user.email" autocomplete="off" placeholder="请输入邮箱"/>
            </el-form-item>
          </el-col>
        </el-row>

        <el-row :gutter="20">
          <el-col :span="12">
            <el-form-item label="性别" prop="gender">
              <el-select v-model="user.gender" placeholder="请选择" style="width: 100%">
                <el-option label="男" :value="1" />
                <el-option label="女" :value="2" />
              </el-select>
            </el-form-item>
          </el-col>
          <el-col :span="12">
            <el-form-item label="状态" prop="status">
              <el-select v-model="user.status" placeholder="请选择" style="width: 100%">
                <el-option label="正常" :value="1" />
                <el-option label="停用" :value="0" />
              </el-select>
            </el-form-item>
          </el-col>
        </el-row>

        <el-row :gutter="20">
          <el-col :span="12">
            <el-form-item label="部门">
              <el-select v-model="user.deptId" placeholder="请选择" clearable style="width: 100%">
                <el-option v-for="dept in deptList"  :key="dept.id"  :label="dept.name"  :value="dept.id" />
              </el-select>
            </el-form-item>
          </el-col>
          <el-col :span="12">
            <el-form-item label="角色">
              <el-select v-model="user.roleId" placeholder="请选择" clearable style="width: 100%">
                <el-option  v-for="role in roleList" :key="role.id"  :label="role.name" :value="role.id"  />
              </el-select>
            </el-form-item>
          </el-col>
        </el-row>

        <el-form-item label="头像">
          <el-upload
            ref="uploadRef"
            class="avatar-uploader"
            action="/api/upload"
            name="image"
            :headers="{'token': token}"
            :before-upload="beforeUpload"
            :show-file-list="false"
            :on-success="handleUploadSuccess"
          >
            <img v-if="user.image" :src="user.image" class="avatar" />
            <el-icon v-else class="avatar-uploader-icon"><Plus /></el-icon>
          </el-upload>
          <div class="upload-tip">图片上传,支持扩展名: .png/.jpg/.jpeg 大小限制: 2M</div>
        </el-form-item>

        <el-form-item label="备注说明">
          <el-input  v-model="user.remark"  type="textarea"  :rows="3"  placeholder="请输入用户的备注信息,最多200字" maxlength="200" show-word-limit/>
        </el-form-item>
      </el-form>

      <template #footer>
        <div class="dialog-footer">
          <el-button @click="dialogFormVisible = false">取消</el-button>
          <el-button type="primary" @click="save">确定</el-button>
        </div>
      </template>
    </el-dialog>

  </div>
</template>

<style scoped>
.user {
  padding: 20px;
  background-color: #fff;
  min-height: 100%;
  border-radius: 8px; /* 添加圆角 */
}

.operation-area {
  margin: 20px 0;
}

.search-form {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
}

.search-form :deep(.el-form-item) {
  margin-right: 20px;
  min-width: 200px;
}

.search-buttons {
  margin-left: auto !important;
  min-width: auto !important;
}

.pagination {
  margin-top: 20px;
  display: flex;
  justify-content: flex-end;
}

:deep(.el-button .el-icon) {
  margin-right: 4px;
}

.avatar-uploader {
  text-align: center;
  /* 添加边框线 */
  border: 1px dashed #141414;
  /* 圆角 */
  border-radius: 10px;
}

.avatar-uploader .avatar {
  width: 100px;
  height: 100px;
  display: block;
  border-radius: 6px;
}

.avatar-uploader .el-upload {
  border: 1px dashed #d9d9d9;
  border-radius: 6px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: var(--el-transition-duration-fast);
}

.avatar-uploader .el-upload:hover {
  border-color: var(--el-color-primary);
}

.avatar-uploader-icon {
  font-size: 28px;
  color: #8c939d;
  width: 100px;
  height: 100px;
  text-align: center;
  line-height: 100px;
}

.upload-tip {
  font-size: 12px;
  color: #999;
  margin-top: 8px;
}

.dialog-footer {
  text-align: right;
}
</style>
